In the Southwestern Pennsylvanian region, the industrial history of Pittsburgh has had noted environmental consequences- for example, the 1948 Donora Smog that killed 20 people eventually led to the creation of the Clean Air Act of 1970. While potential trace metal contamination from modern-day activities is recognized, the magnitude and distribution of this legacy contamination is often unknown. This project reconstructed the impacts of early European settlement on the landscape as well as the opening and closing of the nearby Donora Zinc Works and the American Steel & Wire Works using trace metal geochemistry.